Vacheron Constantin 43175 Patrimony Perpetual Calendar Ultra-Thin 18K WG Black Dial LIMITED

The reference 43175/000G-9874 is a highly collectible Patrimony Perpetual Calendar Ultra-Thin created by Vacheron Constantin for the opening of its Moscow Boutique. Produced as a limited edition of 30 pieces, it stands apart from the standard Patrimony perpetual calendar models through its opaline black dial and boutique-specific rarity. The 41 mm 18K white gold case preserves the Patrimony line's disciplined mid-century elegance, with a slim profile that reinforces the watch's formal character. Inside is the ultra-thin self-winding caliber 1120 QP, one of the maisons most celebrated high-complication movements, measuring just 4.05 mm thick while delivering day, date, month, leap year, and moonphase indications. This movement is especially respected among collectors for combining a perpetual calendar architecture with exceptional thinness and classical finishing standards associated with Geneva haute horlogerie. The moonphase display, with its gold moon against a deep blue sky, adds visual warmth and depth to an otherwise restrained and monochromatic dial layout. As a perpetual calendar, the watch is mechanically programmed to remain accurate until the year 2100, underscoring both its technical sophistication and practical refinement. The model belongs to an important period in Vacheron Constantin's modern Patrimony collection, when the brand was emphasizing pure case design, traditional complications, and historically informed restraint. For collectors focused on discreet rare complications rather than overtly sporty references, this Moscow Boutique edition represents a particularly compelling expression of Vacheron Constantin's ultra-thin calendar watchmaking. Like New with Vacheron Constantin box and papers dated 2020.